Infant and toddler health
Learning Center
Herd immunity and COVID-19: What you need to know
To protect groups of people over time, it helps to know what level of recovery or vaccination in a population makes it hard for a germ to spread.
COVID-19 travel advice
Concerned about COVID-19 when you travel? Follow these tips for safely flying, driving and staying at hotels.
Safety tips for attending school during COVID-19
Consider prevention strategies that you and your child's school can follow to help protect your child from the COVID-19 virus.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
Vaginal odor
Learn about causes of unpleasant or unusual odor from the vagina and when to seek care.
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